Dual valve mechanism for internal combustion engines



April 16, 1935.

E. R. MARQI'EN ET AL 1,998,396

DUAL VALVE MECHANISM FOR INTERNAL COMBUSTION ENGINES Filed March 11, 1952- 5 ternal combustion engines.

Patented Apr. 16, 1935 UNITED STATES PATENT OFFICE DUAL VALVE MECHANISM FOR INTERNAL COMBUSTION ENGINES ware Application'Mareh 11, 1932, Serial No. 598,120

2 Claims. (Cl. 123-90) Our invention relates to dual valve mechanisms for internalcombustion engines.

An object of this invention is to provide dual valves for air intake or exhaust or both for in- The invention is designed primarily for the heads of Diesel engines, but it is adapted to other uses.

Another object is to provide independent adjusting devices between the actuating lever and the arms which directly operate the dual valves.

Referring to the accompanying drawing, Fig. 1 is in part a side elevation and in part a vertical section, parts being broken away and omitted, the section being taken on the line l--| on Fig. 2. Fig. 2 is a plan view of Fig. 1. Fig. 3 is a section on the-line 3--3 on Fig. 1.

I designates a cylinder of a Diesel engine and 2 the piston therein. 3 is a cylinder head secured to the upper end of the cylinder I in any desired manner. The cylinder head is provided with the valve 4 having the stem 5 which carries at its upper end the cylindrical guide 6 which reciprocates in the cylindrical bore 1 in the upper extension 8 of the valve casing 9. The stem 5 projects above the guide 6.

4' is a second valve in the head 3 opening into the upper end of the cylinder I. The stem 5' of this valve extends up through the guide 6' in the extension 8' of the valve casing 9' for the valve 4'.

The cap ID on the extension 8 has the ears ll carrying the pivot I2 on which one end ofthe lever 13 bears. The opposite end of the lever bears upon the upper end of the valve stem 5'. The cap on the extension 8' is provided with ears I! carrying the pivot l2 on which the lever or arm I3 is pivoted. The opposite end of the lever bears upon the upper end of the valve stem 5.

I4 is the main operating lever which is mounted upon the pivot I carried by the fixed support [6. The outer end of the lever l4 carries a roller I6 which rides upon the cam ll on the shaft l8 driven in the usual or any practical manner. The opposite end of the lever l4 carries two transverse vertical screws I9 and IS, the former extending down through the lever I4 and into the lever or arm l3, and the latter extending down through the lever l4 and into the lever or arm l3.

The rotation of the cam I! rocks the lever Mon its pivot l5. This movement of the lever 14 causes the screws to depress the levers or arms l3 and it which causes the'valves 4 and 4' to open and admit air into the cylinder as the piston 2 descends. The screws l9 and I9 constitute means for delicate adjustment of the valve clearances and to maintain the proper timing. Such individual or independent adjustments are essential for operating the dual valves which are actuated by one common lever.

We claim:

1. A valve arrangement for internal combustion engines including a head having a pair of tubular portions extending upwardly on the head thereof and each having a central valve stem guide, said head having a valve seat at the bottom of each tubular portion, an annular cap on each tubular portion having a bearing lug upstanding on its outer side, a pair of parallel levers each having one end rockingly supported in a bearing lug, said levers extending in opposite directions and each having a free end vertically over the center of the opposite tubular portion, a rocking lever mounted to extend over the centers of said pair of levers having a connection with said levers to oscillate the pair simultaneously, and valves insaid tubular portions having stems engaged by said pair of levers.

2. A valve arrangement for internal combustion engines including a head having a pair of tubular portions extending upwardly on the head thereof and each. having a central valve stem guide, said head having a valve seat at the bottom of each tubular portion, an annular cap on each tubular portion having a bearing lug upstanding on its outer side, a pair of parallel levers each having one end rockingly supported in one of the said bearing lugs, said levers extending in opposite directions and each having a free end vertically over the center of the opposite tubular portion, a rocking lever mounted to extend over the centers of said pair of levers, independently operable adjusting screws extending through the rocking lever and each engaging one of said pair of levers to operate the latter to oscillate the pair simultaneously, and valves in said tubular portions having stems engaged by said pair of levers.

EMIL R. MARTEN. GEORGE F. NOLTEIN. 

